Bogsey Boots is an adjective used to qualify the scale of horrendous smell & rancidness inside a girl's old shoes.
The term is made up from "Bogsey" which is an ancient teuchter word for evil girl. When used to prefix "Boots" the two words conjoin to give the term
It is exclusively used as a derogatory term
sorry mate, you're not coming in here with those Bogsey boots on